diff --git a/scripts/game_key.gd b/scripts/game_key.gd
index 5c127f3..1c6258d 100644
--- a/scripts/game_key.gd
+++ b/scripts/game_key.gd
@@ -113,6 +113,9 @@ func _unhandled_input(event: InputEvent) -> void:
 	if (
 		event_key.physical_keycode != props.physical_keycode
 		or event_key.echo
+		or (
+			event_key.physical_keycode == KEY_NONE or props.physical_keycode == KEY_NONE
+		)
 		or (
 			event_key.location != KEY_LOCATION_UNSPECIFIED
 			and props.location != KEY_LOCATION_UNSPECIFIED